Nature Communications (Apr 2022)

Pace of passive margin tectonism revealed by U-Pb dating of fracture-filling calcite

  • William H. Amidon,
  • Andrew R. C. Kylander-Clark,
  • Matthew N. Barr,
  • Samuel F. I. Graf,
  • David P. West

DOI
https://doi.org/10.1038/s41467-022-29680-z
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 7

Abstract

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It is thought that Atlantic style passive margins have experienced episodes of uplift and volcanism in response to changes in mantle circulation. The authors here employ U-Pb dating of calcite in faults and fractures along the eastern North American margin and find a 40 Myr long period of fracturing and faulting from 115 to 75 Ma.